The music must be transformed from the format it is (usually a one class mp3, aac, vorbis, or wma) within the format utilized by audio CDs (which is untrampled). MP3GAIN must then comply with correctly written to a CD. though the music on CDs is digital information, it is written another way to the info on CD-ROMs - CD-ROMs comprise extra fallacy correction to ensure the information might be learn precisely, whereas audio CDs forgo that in order to bother better taking part in existence.